Hello Dean,
> numbers of the form 1811...1181 all die in 5 generations.
... thanks, this is exactly what I was looking for, a pattern
which could be stretched,
Best,
É.
(try 137, in the applet, it's fun !)
http://www.math.com/students/wonders/life/life.html
o ooo ooo
o o o
o ooo o
o o o
o ooo o
>> Is the sequence finite?
> No. (...)